0,4

V. I. Arnold, The calculus of snakes and the combinatorics of Bernoulli, Euler and Springer numbers of Coxeter groups, Uspekhi Mat. Nauk., 47 (#1, 1992), 3-45 = Russian Math. Surveys, Vol. 47 (1992), 1-51.

Cf. A001586.

Sequence in context: A047049 A020034 A128884 this_sequence A054749 A107204 A116151

Adjacent sequences: A007833 A007834 A007835 this_sequence A007837 A007838 A007839

nonn,nice

njas